<template>
	<li>
		<label>
			<input type="checkbox" :checked="todo.done" @click="handlerCheck(todo.id)"/>
			<span>{{todo.title}}</span>
		</label>
		<button class="btn btn-danger" @click="handlerDeleteTodo(todo.id)">删除</button>
	</li>
</template>

<script>
	export default {
		name: 'Item',
		props:['todo','deleteTodo','checkTodo'],
		methods: {
			//点击删除按钮的回调
			handlerDeleteTodo(id){
				//询问用户是否确定删除？
				if(confirm('确定删除吗？')){
					//调用App一层一层贼辛苦传递过来的deleteTodo
					this.deleteTodo(id)
				}
			},
			//点击勾选框的回调
			handlerCheck(id){
				//将勾选 or 取消勾选的id传给App
				this.checkTodo(id)
			}
		},
	}
</script>

<style scoped>
	/*item*/
	li {
		list-style: none;
		height: 36px;
		line-height: 36px;
		padding: 0 5px;
		border-bottom: 1px solid #ddd;
	}

	li label {
		float: left;
		cursor: pointer;
	}

	li label li input {
		vertical-align: middle;
		margin-right: 6px;
		position: relative;
		top: -1px;
	}

	li button {
		float: right;
		display: none;
		margin-top: 3px;
	}

	li:before {
		content: initial;
	}

	li:last-child {
		border-bottom: none;
	}

	li:hover{
		background-color: #ddd;
	}

	li:hover button{
		display: block;
	}
</style>